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Патент USA US2109627

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' March I, 1938.
w. G. H. Fl_NCH
‘SOUND RECORDING SYSTEM
2,109,627
Filed Nov. 30, 1936
' - 12 Sheets-Sheet 1'
SUNDAY FEATURE STRIPS
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SUNDAY NOV. 22,1936
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INVENTOR
williamfgJ?pgi'nch
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ATTORNEY,
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March 1, 1938.
w. G_ H F|N¢H ~
2,109,627
. sounb RECORDING SYSTEM
Filed Nov. 30, 1936
12 Sheets-Sheet 3
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INVENTOR
‘William(9.11‘. 99inch
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ATTORNEY
March 1, 1938.
w. s. H. FINCH
2,109,627
SOUND RECORDING SYSTEM
Filed ‘Nov. so, 1956
12 Sheets-Sheet4
'
INVENTOR
williamfgx?nch
' ATTORNEY’
March 1, 1938.
w_ G H, FlNcH
2,109,627
SOUND RECORDING SYSTEM
Filed Nov. 30, 1936
12 Sheets-Sheet 5 _
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March 1, 1938. '
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w. G. H. FlN_CH
SOUND RECORDING SYSTEM
Filed Nov. 30, 1936
12 Sheets-Sheet 6
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INVENTOR
William tgnil??i'nch
BY
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ATTORNEY
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March 1, 1938.
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2,109,627
SOUND RECORDING SYSTEM
Filed Nov. 30, 1936'
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INVENTORY
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March 1, 1938.
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SOUND RECORDING‘ SYSTEM
Filed Nov; 50, 1936
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Filed Nov. 50,. 1936
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INVENTOR
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William Aqx?'ncb
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March .1, 1933-
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2,109,627
SOUND RECORDING SYSTEM
Filed Nov. :50; 1936
'12 Sheets-Sheet 10
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INVENTOR
William(g.JC.9%'nch
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ATTORNEY
March 1, 1938.
w. G. H. FmCH
2,109,627
SOIUYND RECORDING SYSTEM
Filed Nov. 30, 1936
12 Sheets-Sheet l1
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INVENTOR
William
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ATTORNEY
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March 1, 1938.-
w. G. H. FINCH
2,109,627
SOUND RECORDING SYSTEM
Filed Nov. 50/ 1936
12 Sheets-Sheet 12
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INVENTOB
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ATTORNEY
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Patented Mar. 1,_ 1938
‘ - UNITED STATES
2,109,627
‘PATENT orrlce
2,109,627
SOUND RECORDING SYSTEM
William G. H. Finch, .
Spuyten Duyvil, Bronx
CounW, N. Y.
Application November 30, 1936, Serial No. 113,467
15 Claims. (Cl. 179-1003)
This invention relates to novel sound recording
picture reel except that it is much more econom
ical to produce. The material of this reel is pref
and reproducing systems particularly adapted to erably
opaque and may be paper upon which the
audibly portray‘ newspaper comic and feature
sections.
.
_
.
'
sound tracks are printed by ordinary printing
operations. The printing ‘operation may also be
performed photographically upon sensitive paper
7
An important feature of .modern newspapers is
the comic section‘ consisting of drawings depict
or ?lm to ‘accomplish the same results.‘
The sound records of my present invention may
be used for quality acoustic reproduction includ
ing a continuity of action to form a story, usually
humorous in nature. Many children regularly
follow the antics of the comic characters and im
10 pose upon older people to read the expressions of
these characters. My present‘ invention is. par~
ticularly directed to provide sound records printed .
integral with the comic sections which records
may readily be inserted in a novel reproducing
ing lengthy musical renditions. However, the
widest utility of this invention. resides in acousti
' machine for obtaining an audible account of the
comic action. The audible rendition of comic
sections or other features of a newspaper in a
cally conveying intelligible speech. Accordingly,
by limiting’the‘ frequency response of the appaé
ratus to about 2200 to 2500 cycles, a slower rate of
sound track scanning and simpler electro-optical 15
design as compared to talking-moving picture ap
paratus will prove adequate.
The preferred scanning equipment comprises a
simple and inexpensive manner greatly enhances light source focused upon the sound track and a
the value of these features to individuals, partic
photo-electric cell sensitive to the varying, light »
ularly to children, who cannot read. >Major ad
intensities refracted from the record. A pre-am
vantages of this invention reside in the mechan
pli?er consisting of one or two stages of audio fre
ical recitation of comic sections to youngsters as quency ampli?cation are associated with the pho
well as in providing them with further entertain
to-electric cell to directly amplify the relatively
ment in the‘ use of the accompanying mechanism.
weak electrical signals generated by the photo
In a preferred form of ‘my invention, I print a , electric cell. Although an individual ampli?er
strip containing a plurality ‘of parallel sound and loud speaker for the reproduction equipment
sound tracks along an edge of the sheet contain
may be used, the costof the apparatus may be
ing the pictured story. . The child severs’ this materially decreased by connecting the output of
sound strip from the- sheet and inserts it in one the pre-ampli?er to the audio frequency section
of the novel reproducing devices to be hereinafter of a radio broadcast receiver by means of a plug
described. The printing of the sound track strip
and jack connection.‘
'
'
v
upon the newspaper is similar to the printing op
_ The reproduction apparatus for the newspaper
eration of any picture in the paper. . A zinc plate sound strips operate by frictional feeding instead
is formed from the original sound track and the of sprocket feeding. A notch is cut at a'predeter
steps of printing the facsimile of thesound tracks ‘ mined portion of the sound strip which actuates a
upon the sheet is similar to the well-known prac
relay for shifting the sound strip transverse to the
tise. I prefer to provide perforations upon the
scanning beam'in order to bring the next adjacent
borders of the strip ‘to more accurately de?ne and sound track into scanning position. ,Where}: the
simplify the removal of the strips. ‘ Although a - strip is formed into. an endless belt, the shifting
single length of strip may be employed for re
occurs at the-joint between the beginning and end
production of the feature, modi?cations are pro
of ,the belt. Accordingly, at the moment one
vided whereby a series of strips are attached end sound track is completely. scanned, corresponding
to end to form a continuous belt .of the sound to one revolution of the endless belt, the scanning
.tracks. A further modi?cation employs sound
tracks arranged at an angle to the sheet which are
formed into a cylindrical sheet for reproduction
whereby a continuous helical scanning operation
is used in the reproduction thereof. This modi?
cation may take the forms of either .a strip or
sheet
record.
>
'
~
.
Another important use of my present invention
resides in providing long reels of sound ribbon
operation is‘ continued at the beginning of the
'
next adjacent sound track. , .
'
A single sound strip cut from a newspaper page
may contain the complete story or speech corre
sponding to t e comic action depicted on that
page. This sé'pip may be pasted to form an end- le'ss belt whic forms a plurality of adjacent con-_
tinuous sound tracks‘. This belt“; is inserted in
thereproducing device. A notch, cut in the strip,
containing the plurality of parallel sound tracks‘ initiates
the successive shifting operations be
for use in reading newpapers or books to blindv
55 people.
The sound reel is similar to a moving
_ 'tween- sound track scannings.
By arrangingthe
50
2
2,109,627
sound tracks at an angle to the strip, the endless
belt formed of this strip will contain a continuous
ing mechanism; Figure 12 is a plan view of the
apparatus of Figure 9;v Figure 13 illustrates the
helical spiral connecting the individually ‘printed . elastic coupling for driving _the flyr-wheel to mini
mize strip feeding irregularities, and corresponds
parallel sound tracks. The reproducing device
for such a sound strip does not require a shifting
mechanism but utilizes a predetermined rate of
feed for the scanning beam transverse to the
sound strip. A predetermined length of the sound
strip, for example equal to the standard length of
10 a newspaper sheet, corresponds to a predeter
mined transverse i’eed rate for continuously
scanning the helical sound record.
The modi?cation of the reproducing apparatus
employing a long sound reel performs a reversal
15 of feed direction simultaneously with the track‘
shifting operation. When one end of the reel is
reached, the feeding operation is automatically
reversed and the scanning continues on the next
adjacent sound track. By providing an even
20 number of sound tracks, the reel will be wound
ready for re-use.
Accordingly, an object of my present-invention
is to provide novel methods for audibly portray
ing newspaper comic and feature sections.
25
Another object of my present invention is to
provide a novel newspaper section containing
printed sound records readily detached and re
producible for describing the continuity of
action of a comic feature.
to the view taken along l3.—l3 of Figure 12.
Figure 14 is a schematic illustration of the op
eration of the reproducing apparatus containing
a track shifting mechanism.
Figure _15 is an elevational View of a reproduc- 5
ing apparatus particularly adapted for sound reel 10
reproduction,
'
containing a feeding
reversal
mechanism; Figure 16 is a plan view of apparatus
in Figure 15; Figure 17 is a cross-sectional view
taken along l1—-l1 of Figure 15 showing details
of the ?lm reversing and shifting mechanism; 15
Figure 18 is an end view of the, ?lm relays and
corresponds to the view taken along I8—|8 of
Figure 16; Figure 19 is a modi?cation of the re
lay arrangement corresponding to Figure 18;
Figure 20 illustrates the arrangement of the re
lays with respect to the ?lm for the modification
of Figure 19; Figure 21 is the cross-sectional view
' taken along 2I—2I of Figure 16, showing details
of the reverse feeding drive; Figure 22 is an en
larged cross-sectional detail corresponding to the 25
view taken along 22—22 of Figure 16.
,
Figure 23 is an end view of a modi?ed sound
reproducing apparatus of simpli?ed construction
‘
and hand operated; Figure 24 is a partial‘ plan
Still another object of my present invention is . view of the apparatus of Figure 23; Figure 25 is
to provide novel methods of and apparatus for a cross-sectional view taken along 25-—25,of Fig 30
reproducing sound records printed on newspaper ure 23; Figure 26 is a cross-sectional view taken
pages.
along 26—26 of Figure 23 to illustrate details of
A further object of my present invention is to the ?lm shifting mechanism.
35 provide novel sound reproducing mechanism for
Figure 27 is a partial illustration of a modified
automatically scanning a plurality of adjacent form of sound strip having sound tracks arranged
30
sound tracks of a sound strip.
-
Still a further object of my present invention
40
is to provide simple, inexpensive reproducing
apparatus for sound records primarily suitable
for sound records which can be readily printed
in a neswpaper.
These and other objects of my present inven
tion will become apparent in the following de
scription taken in connection with the drawings,
in which:
.
-
Figure 1 is a preferred illustration of a comic
sheet. containing a single sound ‘strip printed
along one edge of the sheet; Figure 2 illustrates
50 the sound strip of Figure 1 severed from the
sheet; Figure 3 shows the same strip formed into
an endless belt ready to be inserted in the repro
duction apparatus.
at an angle to the strip; Figure 28 illustrates an
endless belt made of the sound strip of Figure 2'7
with the sound tracks forming a helix; Figure 29
illustrates a modi?cation of the apparatus illus 40
trated in Figure 23, corresponding to the section:
of Figure 25, but adapted to continuously scan
the sound strip of Figure 27 without shifting
operations; Figure 30 is an end view correspond
ing to 30--_30 of Figure 29.
45
Figure 31 is an elevational view ‘of a sound
reproducing device for use with the sound sheet
corresponding to Figures 7 and 8; Figure 32 is an
end view of the apparatus of Figure 31; Figure 33
is an enlarged partial cross-sectional view taken .60
along33-33 of Figure 31 to illustrate the mount
ing of the record sheet.
' ,
'
‘The sound strips described herein contain a
Figure 4 illustrates a newspaper sheet contain- . plurality of sound tracks arranged in adjacent
ing a plurality'of sound strips corresponding to and parallel relation between the parallel borders
‘a special feature or story; Figure 5 illustrates of the strip. The original sound record may be 55.
how these several strips are pasted together to formed by any well-known photographic sound
form a long strip with continuous sound tracks; recording process. Although variable density
Figure 6 illustrates a preferred manner of utiliz
recording may be used, I prefer to employ- vari—
ing the long sound strip by forming an endless able area recording for simplicity in reproduction
belt and folding the strip in a compact arrange
by ordinary newspaper machinery. The parallel 60
sound tracks may be formed by superimposing
Figure 7 illustrates a modi?ed sound record a plurality of recorded strips upon the wider strip'
form printed upon a comic section and bearing to be printed. However, I prefer to record with
65 a longer story than a'single strip ‘can contain;
apparatus similar to the sound reproducing
Figure 8 schematically illustrates how this sound mechanism to be hereinafter described, wherein
chart is arrangedon a cylinder and scanned in track shifting means is provided so that record
ment. ”
'
-a continuous helical manner. .
ing operations are merely the inverse of the re
Figure 9 is an elevational view of a preferred producing steps. The particular advantage of
70 form of apparatus for reproducing a long; end
variable area recording resides in that a black
less sound strip; Figure 10 is the cross-sectional ‘ white zinc plate may be used'for printing and
" view taken. along l0—l0 of Figure 9, illustrating the reproduction from newspaper printing is
the shifting relay switch; Figure 11 is a partial more, accurate, resulting in better quality of
cross-sectional view taken along ll—il of Fig
sound.
75 ure 9 illustrating the details of the scanner shift~
The records corresponding to speech may be
if)
3
2,109,627
2200 to about 2500 cycles so that a relatively
The single sound strip 14 contains a story suf
?cient to explain the .antics of the comic feature
‘slower speed for feeding the tracks may be used..
I l with which it is associated. This modi?cation
limited to a reproduction frequency of about
I have found that a linear feed rate of twenty-I ‘ of single strip representation requires a separate
?ve to thirty feet per second gives excellent re
sults for speech. My present invention, how
ever, is not to be considered as limited to this
speed range since lower or higher speeds ar
equally feasible.
10
.
.
a
I consider the most advantageous application
of my present invention to‘newspaper features‘
where inexpensive sound records are made avail
able to the public in connection with news, fea
tured articles or comic strips. Figure 1 illustrates
the application of my present invention to a Sun;
day comic sheet.‘ However, daily comic sheets
sound strip corresponding to strip 14 to be ‘printed
with each‘comic feature. -'I'he feature'or story‘
which the youngster desires to reproduce is in
dividually‘severed from the corresponding sheet
and formed into a band. illustrated in Figure 3. p
' A modi?cation of single strip recording is to 10
provide a special page 2|, such as illustrated in’
Figure 4,; upon which a plurality of sound strips
22 ‘are printed'corresponding to all the comics
in the newspaper. The length of thevstory de
pends upon the number of strips 22 provided. 15
It is evident that the feature strips 22;may be
used to relate special features or stories for the
youngsters besides describing the comic features.
Figure 5 illustrates how the strips 22 are at
tached to form a long strip 23 of the individual 20
strips 22 printedon sheet 2|. The darkened por
tions 24. at the beginning of each strip are pasted
or features may equally well be substituted.
Sheet I0 is rectangular in form and has printed
thereon a‘ plurality of drawings ll successively
20 depicting the action of a comic character or fea
ture. The drawings ll contain balloons l2 in
which reading matter corresponding to the speech
of the comic characters appears. The reading
‘matter is.’ generally di?icult for youngsters to
25 either read or interpret. My invention overcomes
the necessity for assistance from older folkby
providing a sound record printed upon the sheet
together with the comic feature. B'y reproduc
ing the sound record with simple apparatusthe
30 child is told the story of the comic drawings in
simple language.
'
beneath the end of the preceding strip as illus- ,
trated in Figure 5 so that thecontiguous ends of the sound strips 22 form continuous individual 25
sound tracks. A notch 25 is cut into the end of
the long sound strip 23 for a purpose similar to
that of notch 20.
. . Figure 6 illustrates a preferred arrangement
~
for utilizing the sound record 23 by'forming an
endless strip 26. The strip 26 contains folds 21
I prefer to arrange the sound record near the
long edge l3 of the rectangular sheet 19 in the
form' of a sound strip l4 containing a plurality
so that a long strip 23 may be arranged in a
of adjacent and parallel sound tracks l5. For
simplicity in the drawings, I onlyillustrated ?ve
tracks l5. However, it is to be understood that
record supplements is illustrated in Figure '7
more tracks may be used.
These tracks need
only be one-eighth of an inch in width for good
40 quality sound reproduction. A narrow strip may
readily contain eight or twelve parallel tracks.
However, it is preferable to standardize. the width
of the strip 14 as well as the width and number
of tracks 15 upon strip M in order that a uni
form sound reproducing apparatus may be sold
to operate with these printed records.
.
The sound strip 14 is printed upon sheet“!
simultaneously with the printing of ‘the pictures
or drawings H.
The original sound record is
.51) formed as a negative upon a zinc plate.
The
plate is arranged together with the plates for the
drawings H in the preparation of the platen for
printing the sheet ID in a manner well known in
the newspaper printing art. .An important fea
ture 'of the sound record of my present inven
tion is the provision of perforations l6 and 11 to
accurately predetermine the boundary edges of
the strip l4. The perforations l6 need not pene
trate through the sheet l0 but may merely be
.60 indentations in the sheet formed by‘ raised por
tions-of the platen. The perforation or score
lines It; and I1 facilitate removal of the sound
strip 14 from the newspaper page In.
Figure 2 illustrates the sound strip I4 severed
from the newspaper sheet ID. A dark portion I8
is formed at one end of the strip 14. An endless
band is formed of the strip I4 by pasting the
end 19 of- strip l4 on top of the dark portion l8.
The parallel sound tracks [5 are accordingly
joined into continuous parallel adjacent sound
tracks. A notch .20 printed upon strip I4 is cut
out as illustrated. Notch 20 actuates the track
shifting mechanism to be hereinafter described
for automatically and successively scanning the
adjacent sound tracks.
compact form in a reproducing apparatus.
A modi?ed arrangement for newspaper sound
where a relatively wide sound section 28 is print
ed upon page 29 containing parallel sound tracks
30 arranged at an angle to the edges of the sheet
29. The angle of the sound tracks 30 is designed
so that when the sound sheet 28 is severed from - 40
page 29, the contiguous ends of the tracks form
'a continuous helix. Figure 8 schematically illus
trates how the sound sheet 28 is arranged in a
cylindrical form so that the sound tracks 30 form
a helix. I prefer to provide two dark areas 3|.
and 32 on opposite edges of the sound sheet 28
to facilitate mounting of the sheet upon a drum
of the reproducing apparatus therefor. Suitable
apparatus for reproducing the sound sheet 28 is
illustrated in'Figures 31 to 33. .
Figures 9 .to 13 illustrate a preferred embodi
mentfof a mechanism-for reproducing endless
sound record 23 of Figures 4, 5, and 6. The record
23 is inserted in the machine around guide 33
between friction rollers 34 and 35, through mag- ;
azine 44 and around guide pulley 36. A shoe
31 is mechanically biased by spring 38 against
strip 23 in guide 33.
‘
'
The length of the record strip 23-is immaterial.
It is folded up with folds 21 within magazine 44;
entering at the inlet 39 and passing through the
outlet 40 of the magazine 44. Friction roller 35
is driven by fly-wheel 10 at a constant speed.
Follower 34 is mechanically biased toward drive
roller 35 by spring 4| operating on a pivoted‘
lever 42 supporting roller 34;__, The strip 23 is ac-'
cordingly ?rmly pressed against drive roller 35
and pushed into magazine 44 and drawn at a
constant speed past the scanning apparatus 43.
The scanning apparatus 43 comprises an ex
- citer lamp 45 containing a ?lament 46 which is
electrically heated to an intense‘ light source.
The light from ?lament 46 is condensed by suit
able lenses through a rectangular slot 41 and
focused in a narrow rectangular ‘beam-upon a
2,109,627
single sound track of sound strip 23. The rec
tangular slot“ is preferably .002 of an inch in
width and of length equal to the length of the
sound track preferably one-eighth of an inch.
The intense narrow light beam impinging upon
the sound track of record 23 is refracted there
from and is focused upon a photoelectric cell 48
by a suitable lens system.49. -
I have found that it is advisable to arrange the I
10 light beam to impinge perpendicularly upon
sound strip 23 to avoid re?ected light from af
fecting the photoelectric cell 48. The light en~
tering the photoelectric cell 48 is accordingly
substantially all refracted light and no re?ected
15 light. The refracted light intensity varies in
.bed 56 due to the biasing spring 59 continuously
acting thereon. When the electrical impulse is
'over the spring 62 draws armature 60 away from
relay 6i simultaneously removing pawl arm 65
.and engaging pawl arm 63 with the rack 56.
The scanner mechanism 43 is accordingly
shifted for a distance equal to one tooth of rack
56 which is equal to the distance between the
sound tracks on sound strip 23. Since the shift
ing operation occurs at a predetermined posi 10
tion corresponding to the beginning-ending por
tion of the endless sound strip, the next adja
cent sound strip will be brought into scanning
relation and the sound continuity will not be
materially interrupted between the sound tracks
‘accordance with the corresponding soundv varia
as will now be evident.
tions in a manner well known in the art. The out
driven by shaft 86 mounted in bearings 61 and
put of the photoelectric cell is connected to an
\68. Fly-wheel 18 is secured to drive shaft 66 to
smooth any irregularities of motion transmitted
to the drive roller 35 and the sound strip 23.
20
Figure 12 is a plan view of the sound repro
audio frequency pre-ampli?er (not shown) to
generate electrical currents varying directly in
accordance with the ‘refracted light intensity.
These electric currents are used to reproduce the
The drive roller 35 is
ducing apparatus illustrated in Figures 9, 10,
sounds originally ‘recorded upon sound tracks in
and 11, more clearly illustrating the drive mecha
a manner to be hereinafter described in ‘more
detail in connection with Figure 14. \
nism. The apparatus is mounted on a baseboard
When. the ?rst sound track of the endless strip
23 has been scanned by the scanner 43, means
are provided for automatically shifting the scan
ner 43 opposite the next adjacent track so that
the scanning operation continues on the second
sound track at the proper time;
nous motor, is connected to a. source of electrical
The scanner 43, is mounted upon a bed plate
58 which is movable step by step by the shifting
1|. An electric motor 12 preferably a synchro
energy by leads 13. The speed of motor 12 may
be 1200 or 1800 revolutions per minute. A pulley
15 is secured to motor shaft 14 and is belted to
a larger pulley 16 by belt 11. The larger pulley 30
16 directly drives fly-wheel 10.through an elastic
coupling 18. The elastic coupling ?lters out
surges or other irregularities in ?lm feeding as
apparatus 5| in a manner to be described in con
will be understood by those skilled in the art.
nection with Figure 111 The shifting apparatus _
Figure 13 is a cross-sectional view taken along 35
5| is controlled by electrical relay operated by a
relay switch 52 positioned opposite the scanner
beam.
.
.
’ Figure 10 is a cross-sectional view across 10
lll of Figure 9 showing the shifter relay switch
52 in cooperation with the: sound record 23.
Switch 52 contains a‘ blade 53 extending against
the edge of guide 33 and the: corresponding side
of record 23. Switch 52 illustrated in circuit
closing position corresponds to the actuated posi
tion when switch blade 53 is opposite the notch
' 25 of strip 23.
-
Figure 11 is a partial cross-sectional. view taken
along H--H of Figure 9 illustrating further de
tails of the shifter arrangement. The movable
I3--|3 of Figure 12, illustrating a preferred form
of elastic coupling 18. Coupling 18 consists of a
plurality of leaf springs 80 symmetrically ar
ranged about a block 81 rotatably mounted on
‘drive shaft 66. Block 8! is rigidly secured to the 40
hub of pulley 16 and is accordingly directly driven
by motor 12 at a reduced speed ratio equal to
the diametrica? ratios between pulleys 14 and
16. Lever springs 80 are suitably mounted about
the periphery of block 8|. The projecting ends 45
of leaf springs 80 are set-into corresponding pairs
of adjacent pins 82 projecting from ?y wheel 18.
Fly-wheel 10 is accordingly rotated by the cou
pling between leaf springs 80 and the driven
block 81. Irregularities in speed are filtered by
the elastic or compliant action of springs 80.
scanner bed 50 is guided by a dovetail extension
54 in the frame 55 enclosing the shifter mecha
Figure 14‘ is a diagrammatic illustration of a
nism 5|. A rack 56 projects from the bed 58 and modi?ed form of the sound reproducingappa
engages a pivoted double pawl 51; The scanner ratus illustrated in Figures 9 to 13, further show
55 bed 50 is mechanically biased toward the right
ing the preferred electrical circuit arrangement 55
by a pusher rod 58 and a compression spring 53. therefor. ‘The. synchronous motor 18' is ‘con
The bed 56 is held against movement by them
nected to an electrical outlet plug 83 by conduc
gagement of rack 56 with an arm. of pawl 51. tor 13. The motor shaft 14 is connected to ?y
The armature portion 60 of pawl 51 is normally _wheel 10 by reduction gearing schematically
60 drawn away from the relay 6 l by a biasing spring
shown by 84. The drive shaft 66' is directly con
62. The arm 63 of double pawl 51-accordingly nected to drive roller 35 which co-acts with a
engages a tooth of rack 56 to prevent movement
follower not shown, behind roller '35 to feed
of the scanner bed 56. When the switch 52 is sound strip 23 at a constant speed by friction. In
“closed in response to themotch being positioned
this modi?cation, the sound record 23 is shifted
65 opposite the scanner beam, the circuit contain
and the scanner mechanism 43 is stationary. Ac
ing an electromotive force or battery 64 and the
cordingly, the cross section of drive shaft 66' is
relay 6! is‘closed and armature '68 of pawl 51
square so that the drive roller 35 may be moved
is attracted thereto against’ the action of spring along the shaft 66' while maintaining a driving
62. The attracted position is illustrated in Fig
connection th reto.
.
ure 11, showing pawl arm 63 removed from rack
An annula groove 85 is cut into the supported
56 and the opposite arm 65 engaged with a tooth end of drive roller 35 and set into a support plate
of rack 56. The operation of the rack 56 and 86. (Guide 81 accurately guides the record'strip
double pawl 51 is equivalent to an escapement 23-past the scanning mechanism 43. Due to the
mechanism whereby an electrical impulse per . perforations de?ning the parallel edges of the
mits a single tooth displacement 'of the scanner record-‘strip 23, the positions of the sound tracks
5
2,109,627
22‘ are accurately predetermined since their dis
tance from the scored or perforated edges of the
strip 23 are~ also predetermined, as described in
connection with Figures 1 and 2 hereinabove.
Guide 81 is' also supported upon plate 89. ‘A
transverse movement of plate 86 will carry the
drive roller, 35, follower (not shown), guide 81
and the record strip 23 transverse to the scanning‘,
beam.
The shifting of the strip 23. and the associated
10
integral with the recording apparatus, and sold
as a unitary structure, it is preferable to manu
facture them separately so that ‘a home radio
broadcast receiver such as receiver 98 may be
employed to save the expense of the ampli?er 95
and speaker 91. A simple jack 99 connection to
the audio frequency section of the- receiver 98,
well known to those skilled in the radio art, pro
vides a means for simply connecting the output
feeding mechanism is accomplished by the shift-_
ing mechanism 5|. The rack 56 is integrally con
nected with the support plate 86, by member 88.
The teeth of rack 56 coact with the pivoted double
15 pawl 51 to form a step—by-step escapement. The
rack 56 is mechanically biased toward the right
of pre-ampli?er 92 to the receiver 98 by the tele 10
phone plug 94. The connection between the pre
ampli?er 92 and the radio receiver 98 may be
made at the phonograph input connections which
most modern radio receivers provide.
‘ The sound strips described in connection with 15
Figures 1 tov 8 and employed ‘in the recording
apparatus hereinabove described, may be sold to
by biasing spring 59'. The escapement mecha
nism is actuated by relay magnet 6| operating ' the public in inexpensive book or magazine form,
useful for educational and amuse
on armature 60 connected to pawl 51. The particularly
ment features for children. ‘Geography, history
20 shifter relay circuit'is similar to the above de
and ?ction may be readily conveyed in ‘an inter
scribed circuit bearing the same numerals, and esting manner to children having the sound re
comprises the switch lever 53, switch 52 and elec
cording apparatus which they could also use for v
tromotive force 84. The notch 25 set on one side the daily and Sunday comic sections provided by
of the record strip 23 at the beginning-end sec
the newspaper. Whole stories may be out out and 25
25 tion 23a permits thevswitch' lever 53 to be moved
pasted together in sound record form for the
by spring 53' to close the relay SI circuit so that _
enjoyment
and entertainment of the youngsters.
armature 60v will be attracted and subsequently
When lengthy stories or books are to berecorded
released to permit the sound strip 23 to be shift
ed to the right by distance equal-to the width of by the printed, opaque sound strips of my pres .30
vent'invention, it -is preferable to use a long reel
30 a sound track 22’. The shifting operation, ac-_
sold in reel form ready for insertion in suitable
cordingly, permits the scanning of the sound recording
apparatus to be hereinafter described.
tracks to continue on'the next adjacent sound This reel may
preferably have sprocket perfora
track (to the left) at the moment notch 25 tions adjacent the edges for positive feeding
‘ reaches the follower 53a on switch arm 53 as will
through the. apparatus similar to moving picture
now be evident and the beam passes the bound
ary
23a.
-
_
'
'
-
The scanner 43 of this modi?cation is station
ary and the sound strip 23 is shifted. A station
ary position of the sensitive photoelectric cell 48
40 and the light beam is a quieter methodv of per-
?lm. However, frictional feeding as herein de
scribed is entirely feasible. The talking book is .
particularly useful for' blind people who may
readily learn to operate the recording apparatus
40
unaided.
,
_
'
,
,
15 to 22 illustrate a modified form of
forming the track shifting'continuity as com ~ theFigures
sound-reproducing, apparatus employing a
pared to the modi?cation of Figures 9 to 13 where
‘the electro-optical system is shifted. Shifting of long sound record reel. This modi?cation em
ploys sprocket feeding for the sound strip I00
the electro-optical- system invariably means a
which
contains squareholes IN to coact with the 45
45 thump or noise due to the inherent jarring thereof
sprocket
drive roller I02. ‘When one end. of the
whereas shifting of the sound strip is accompanied
reel is reached, means ‘are provided for automati
' by negligible noise. The ?lament 45 of the .exciter
reversing the direction of feed of the sound
lamp 45 is preferably heated by a ‘step-down cally
strip I00 andsimultaneously shifting the strip
transformer 90 connected by leads 9I to the out
so that the next adjacent-sound track will be 50
let plug 83'when an alternating current source is opposite the scanning mechanism for continuing
used. It is 'to be‘ understood that my present‘ the sound reproduction.
'
invention is not limited to alternating current in
Referring to Figure 15, the sound strip I00‘is '
application, but direct current energy for driving
the motor ' ‘I0 and operating the lamp 45 and
ampli?er equipment may be used.
-
I prefer to include a pro-ampli?er 92 directly
connected to the photo-electric cell 48 circuit to
amplify the low' intensity current variations of .
the cell 48- to an appreciable value at the output
of ampli?er 92-1 The electrical output 93 of
60 93
ampli?er 92 is an audio frequency corresponding
to the sound to be reproduced from the record be
ing scanned as will be understood by those skilled
in the art. The output 93.. _is preferably con
nected to a telephone plug 94 for insertion into a
jack connected to a suitable audio frequency
amplifying out?t. Audio frequency ampli?er 95
is shown having a jack 96 connected to the input
thereof so that- the insert of plug‘94 into jack 96
will connect the output 93 of pre-ampli?er 92 to
the audio ampli?er section 95. ‘The output of
shown rolled up in a reel I03 on the lower spool
I04. The position illustrated is when the upper
reel spool I05 has been unwound and the feed di
rection is about to be reversed.- The sound strip
I00 is threaded about drive sprocket roller-102
between idler roller. I06 and I01 and around .guide
- drum I08. The scanner mechanism H0 is similar
to the scanner mechanism 43 hereinabove de
scribed and comprises an- exciter lamp III and‘
photo-electric cell H2 focused upon the sound
strip I00. _In this modi?cation, the track shift- ing mechanism H3 is designed to shift the strip 65
I00 and its associated feeding mechanism in re
sponse to the shifting impulse in a manner to be
hereinafter described.
’
'
Figure 16 is a partial plan view of this modi
?cation. The apparatus is mounted on a cast iron 70
'base H4 and is driven by an electric motor II5
of the synchronous type. The motor
audio frequency ampli?er 95 is connected to a preferably
drives the pulleylli andbelt II‘I. ‘Pulley
loud speaker 91 for acoustic reproduction of the j I.Il5
I 6 in turn drives the differentially arranged bevel
sound record. ' Although the audio frequency '
gears
I_'II!*'—<I.I.9--'—II20. Fly-wheels HI and I22. 75
‘ ampli?er 95 and loud speaker S'Imay be made
6
2,109,627
are accordingly continuously rotated in opposite
directions. I prefer to employthis double fly
wheel arrangement for reversibly driving the
sound strip I00 in order to secure an efficient
and rapid reversal in response to the impulse
therefor.
Figure 17 is a cross-sectional view taken along
I1--I1 of Figure 16, to more clearly illustrate
the ?lm reversal drive arrangement. Fly-wheels‘
10 I2I' and I22 are respectively keyed to sleeves I23
and‘ I24. 5 Sleeves I23 and I24 are rotatably
mounted on shaft I25. Bevel gear I I9 is‘rotatably'
mounted on sleeve I23 and is compliantly keyed
to ?y~wheel I22 by a leaf spring connection I26
15 similar to the connection 18 hereinabove de
scribed in connection with Figure 13. Bevel gear
I20 is similarly rotatably mounted on sleeve I24
and connected to fly-wheel I22 by a leaf spring
connection I21.
20
-
A positive clutch I28 is located between the
bevelled gears H9 and I20 toselectively engage
and be driven by either one in response to record
engagedyand the second‘drive pulley becomes
engaged to rotate the opposite reel for winding
up the sound strip‘ I00.
.
.
The ?lm I00 is positively driven by the sprocket
roller I02, the respective reels I04 and I05 serv
ing to wind-up the ?lm in a reel I03 for suitable
handling or transportation thereof. Any dif
ferential speed between the reel I03 as being
Wound by the corresponding spool, and the strip
I00 at the drive sprocket I 02, is taken up or com
10
pensated by the slippage referred to at the ?ex
ible belting I36 and I31. The sprocket roller I02
is connected to drive rod I25 by a splined ,ex
tension I4I. Sprocket roller I02 is pinned to a
rod I42 having an extension I43 co-acting with 15
the splined extension MI. The splined relation
between shaft I 25 and sprocket roller I02 permits
a positive rotative action therebetween and also
permits a transverse shifting of the sprocket and
feed mechanism for the ?lm I00 in response to a
shifting impulse to be described.
The rod .I42 supporting sprocket roller>I02 is
20.
reversing impulses to be described. The positive mounted in a plate member I44 supported on a
clutch H8 is slidably keyed by feather keys I30 movable bed I45. The step by step shifting mech
to shaft I 25. Clutch member I28 is rotatably. anism I I3 is similar in construction to the escape
'25
mounted at an end of lever I33 in yoke I34 so ment mechanism 5| hereinabove, described in‘
that it is free to be rotated with respect to lever connection with Figures 9 through 13. The
I33 and also move into engagement with bevel
gear H9 or I20. The hub of bevel gears H9
30 and I20 respectively contain teeth I3I and I32 for‘
coacting with the corresponding teeth of clutch
member I28. The illustrations show clutch mem
ber I28 engaged with bevelled gear I20 so that
the shaft I25 is positively driven by bevel gear
ca O1 I20 in the corresponding direction of rotation.
A drive shaft I25 is connected to pulleys I34
and I35 which selectively drive the reel spools
I04 and I05. Pulleys I34 and I35 are connected
to shaft I25 by a simple clutch arrangement
40 which maintains apositive driving connection
with one pulley when shaft I25 turns in one di
rection, being free of the other; and when shaft
I25 .reverses its direction of rotation, the idle
pulley will beengaged and the other pulley will
45 become disengaged. Figure 22 is an enlarged
cross-sectional view through pulley I35 showing
pins I 39 and biasing springs I39’ on opposite
sides of a head I38 projecting from shaft I25.
The springs I39’ mechanically bias the pins or
rollers I33 to a wider space so that the pulley
becomes disengaged when the shaft I 25 rotates
clockwise.
However, when shaft
I 25 . rotates
counterclockwise, the pins‘ I36 positively grip
the inner surface of pulley I35 and shaft I25 to
55 rotate the pulley. Pulley I34 is similar to I35
except that it will engage and disengage for op
posite rotations of shaft I 25.
Pulley I34 drives lower spool I04 by means of a
?exible belt I36. Belt I36 is preferably a wire
belt to permit slippage between the drive pulley
I34 and the driven pulley I40. The slippage is
required when reverse rotation: of the feeding
takes place and the spool is suddenly forced to
drive in an opposite direction as will be explained.
The upper spool I05 is similarly driven by ?ex
ible belt I31 connected to drive pulley I35. Ac
cordingly, when shaft I25 is rotated in one direc
tion, a corresponding spool is engaged and ro
tated to wind-up a reel of the sound strip I00 in
a direction corresponding to the feeding direction
imparted to the strip I00_ by the sprocket drive
roller I02. When a reversal impulse shifts the
clutch I28 to they opposite drive direction, the ro_
‘ tation of shaft I25 is immediately reversed and
the drive pulley previously engaged 180011185 ‘.115
double pawl I46 engages the rack I41 attached
to the bottom of bed I 45. A spring I 48 presses
against a pin I50 attached to the plate I44. 30
Plate I44 is, accordingly, mechanically biased
to the right by spring_l48 ‘and normally held
against movement by the escapement mechanism
II3. An electrical impulse sent through magnet
I5I from battery I52 attracts armature I53 of 35
pawl I46 against the action of spring I54 to per
mit the bed plate I45 to move a distance equal to
one tooth of rack I41. The movement of bed I45
to the right carries with it the sprocket roller I02
and associated follower or presser rollers I06 and 40
I01 and the guide drum I08. The drive connec—
tion of'sprocke't roller I 02 and shaft I25 is un
interrupted at the splined connection. The record
strip I00 is, accordingly, shifted to the right by
a distance equal to‘ the width between the sound 45
tracks printed thereon so that the next adjacent
sound track is moved into position opposite the
' scanner means H0.
The shifting impulse is imparted by a pre
determined portion of the sound strip I00 near 50
each ‘end of the strip. I have illustrated the
simple notch I 56 and I56’ near opposite ends of
the record strip I00 to effect the shifting and
reversal impulses. A relay switch I51 operates
the electrical circuit for providing the electrical 55
impulses. A blade I58 ofswitch I51 contains a
follower I59 which continually acts against one
edge ofthe sound strip I00. In the illustrated
position sound strip I00 has been traveling to
ward the left and notch I56 has reached the. 60
position opposite follower I59 to permit relay
switch I51 to close the circuit including battery
I52. When the relay I51 is closed an electrical
impulse ‘flows through relay I5I ‘to attract arma
ture I53 and effect a single step escapement or
shifting of the sound strip I00; an electrical im-
pulse simultaneously also flows through relay I60
of the feed reversal mechanism. Relays I5I and
I60 are connected in serieswith battery. I52 and
switch
I51.
‘
_
_
The reversal mechanism is controlled by a lever
I33 which contains the double armature arrange
ment I6I and I62. Armature "BI is shown at
tracted to the relay I-60 so that positive clutch
70
I28 is thrown into engagement with bevel gear 75
'
2,109,627
between drive roller I69 and follower I10,'looped
I20. Figure 17 illustrates the mechanism at the
time of reversal of moveme'nt'and shifting of
sound strip I00 in response to the notch I56 ac
.tion on switch follower I59.‘ I have preferred to
around they adjustable wire support "I and held
position by shoe I12 mechanically biased_
against a portion of guide members I68 by spring
I13. The position of.wire I1I is'adjustable inv
bracket I14 and fastened by .thumb screw I15
therein. The sound strip I61 is fed past the
scanning mechanism I11 by frictional_engage
' in
use a snap switch or lever arrangement I63 at ’
the end of lever I33 in order to effect a sub
stantially instantaneous reversal at clutch I28. '
When the ‘sound strip reaches the opposite end
mentof the drive roller I69 and follower I10. ‘
and notch I56’ comes in position near the switch Drive roller I69 is- preferably mounted on- a 10'
followers, the mechanism is prepared to reverse square shaft I18 to permit the shifting of the
the feeding direction and shift the strip one more.
step to the right. I prefer to employ ~a second sound strip I61 and associated feeding mecha-',
relay switch I64 having an independent follower nism in response to 'the mechanical shifting
operation.
'
I65 spaced- from the‘?rst follower I59. The dis
The strip feeding members are supported upon .15
tance' between switch followers I59 and I65 is
upright I19 which extends from bed plate I80.
designed so that the reversal of feeding will oc
Bed plate I80 contains a dovetail’ slide I8I en
cur before the notch I56 can pass from one fol
gaging with a corresponding groove in bracket
lower to the next. In other words, the distance
I82. The strip feeding mechanism is a'ccord- '
between theswitch followers is designed to ef
ingly movableon supporting bracket I82 trans
20 fect the actuation of both switches I51 and I64
by either, of the notches I56 or I56’. Accord
‘verse to the stationary scanning system I11.
Figure 25 is the partial cross-sectional view
ingly, notch I56’ will actuate switch follower I65
taken along 254-25 of Figure 23 to more clearly
in front of the scanning means I I0. When switch 7 illustrate details of'the shifting means I83. The
I64 is closed relay I5i e?ects a step of shifting at ' drive roller I69 is‘ slidably mounted on square
shaft I18 and rotatably supported in upright. I19.
the escapement mechanism I I3 and relay I66 at
tracts armature I62 to engage positive clutch I28 ‘An extension of‘roller I69 projects beyond up
right I19. A spring I84 is placed between the
with the bevel gear II9 -to substantially instanta
head
I85 of roller- I69 extension and the upright 30
neously reverse the direction of rotation of shaft
‘I25. The sound strip I00 will then continue to I19 to‘ accurately maintain the;relative position
be scanned in the same direction as the original between the roller I69 and the shifting- mecha
Drive roller I69 "is moved transverse to
motion described, with the third track being nism.
the scanning direction slidably upon the square
scanned instead ofthe ?rst. The cycle of re
versal of feed and shifting is similarly repeated shaft‘ I18. The notch I81 formed at a prede
termined portion of sound strip I61 permits the
as the strip is fed in front of the scanning mech
anism IIO between notches I56 and I56’. The follower I88 to be displaced fromits normal posi
position of notches I56 and I56’ upon strip I00 tion and in turn actuate the shifter escapement
is predetermined with respect to the position of
Follower I88 is mounted at ‘one end of the 40
followers I59 and I65 on ‘the guide drum I08, actuating
lever I89. Lever I89 is supported upon
and the position of the edge of they sound tracks
gear I90 on upright I19. A compound-curve is
_ on the strip I00.
Figure 18 is a cross-sectional view taken along formed at the end of lever I89 containing the
when the leftend portion of the ?lm strip passes
mechanism
I18.
.
'
.
'
follower I88 so that when follower I88 is de
pressed when notch I'81 reaches it, a twist of the 45
body of rod I89 occurs. A spring I9I mechani
I08.
>
‘Y
A modi?ed arrangement of the switch followers cally biases-one section of the compound curved
I59 and I65 is‘ illustrated in Figures 19 and 20. ‘portion of lever I89 to effect a twist of the lever
.
~
'
Notches I56a and I56a’ are placed on opposite =wh'en notch I81 is reached.
The
opposite
end
of
lever
I89
is
secured
to-a
sides of the strip I00. The switch followers I59
I8-—I8 on Figure 16, being an elevationv of the
relay switches I51 and I64 and the guide drum
and» I65 are-placed in opposed relation along
opposite edges of strip I00. The reversal .of strip
double pawl I92 most clearly illustrated in Fig
ure 26.. The double pawl I92 engages the rack
I00 need not be performed in the very short in
I98 secured to the bottom of the bed plate I80.
_A spring I94 connects two pins _I95-I96 pro
plate I80.; and bracket I82 55.
modi?cation shown in Figures 17 and 18 and, jecting from the bed
accordingly, the notches I56a and I560.’ are respectively. Spring I94 accordingly mechani
shown longer than the corresponding notches I56 cally- biases bed plate I80 and the strip feeding
mechanism toward‘ the right. The 'escapement
and I56’. Each notch can only actuate its asso
members co'nsist primarily of double pawl I92
ciated relay. The electrical actions and func
tions of the relays illustrated in Figures 19 and and rack I93 maintains the strip feeding mecha-.
nism in stationary relationship with respect to
20 are identical to those illustrated in Figures
terval necessary _ for proper operation of the
1'1 and 18.
'
:
The design of the sound reproducing appa
ratus illustrated in Figures 23 to 26 is simpli?ed
to reduce the expense in manufacturing and as
65 sembling the component parts. A manual drive
is substituted for the electric motor. A me
chanical shifting arrangement, directly actuated
by the predetermined portion of the soundstrip
controls the step-by-step escapement or shifting
70 means instead of the electrical relay arrange
ment hereinabove described.
'
The sound‘ strip I61 is joined to form an end
less strip similar to the strip 23 of Figure _6.
' Strip I61 is inserted about guide member I68“,
s1.
the scanning means I11 and permits a shift of
the strip to the rightwhen the follower I88 en
gages with notch I81 as will now be evident.
_
The square-shaft I18 is directly connected to
the hand lever I91 and is supported by a bracket
I91a. A fly-wheel I98 is pinned to the square
shaft I18 to steady any ?uctuations in the driv
ing eifort.
-
_
g
The pre-ampli?er is preferably located within 70
the supporting structure for the scanner mecha
nism I11. The [ire-ampli?er I99 ‘is schematically
indicated in Figure 23 as comprising two ampli
fler tubes mounted on a sub-panel. j The pre
ampli?er section I 99 is adjacent the photo-electric
's
2,109,627
cell which collects the refracted light in a manner
hereinabove described.
-
Y -'
Figures 27 to 30 inclusive relate to a modi?ed
form of my present invention wherein the step
by-step shifting operation is eliminated.
10
The
between the rotation of drum 225 and the elec
tro-optical system 221. The scanner 221 accord
ingly follows the helical arrangement of the
tracks 230 and translates the varying shading
of the tracks to correspondingly vary electrical
audio frequency currents. The position of scan
sound record of this modi?cation consists of a
plurality of sound tracks 200 arranged at an angle
to the edge of the carrier sheet 20l and sides 202
ner mechanism 221 is adjustable along feed screw
of ‘the record strip 203.
engaging and disengaging connection between the
v
Figure'27 is an enlarged partial illustration of
such a record-strip, corresponding to the single
strip l4 described in connection withlFigures 1,
2, and 3. The sound strip 203 is severed from
the sheet carrier 20l in a similar manner. The
15 length of strip 203 is predetermined so that when
formed into an endless strip by securing end
204 beneath the opposite end of the strip, the
sound tracks will form a continuous helix. Fig
ure 28 illustrates the endless form into which
20 sound strip 203 is made. The beginning-ending
section 205 of the band 203 joins the parallel
sound tracks 200 into a continuous single helical
sound track. No notch or other shifter actuating
means need be employed in‘ this modi?cation.
The sound recording device of this modi?cation
is similar to the mechanism illustrated in Figures
23 to 26 hereinabove. Figure 29 corresponds to
the view of Figure 25 of the preceding modi?ca
tion; The hand lever 206 is used to rotate ?y
30 wheel 201 and square‘shaft 208. The drive roller
2l0 is mounted upon upright 2| I in a manner
similar to the mounting of the roller I69.
230 by means of a lever 233 operating on an
base of scanner 221 and feed screw 230 which
. is not illustrated.
Figure 32 is an end view of the drum sound
reproducer illustrating the relation of the scan
ner 221 with the drum 225. The light beam
emanates from the lens system 234 perpendicular
to the drum 225. The photoelectric call 235 col
lects a portion of the light refracted from the
sound sheet 228 in a manner already described.
It is advisable that the sound sheet- 221 be
mounted upon drum 225 with a minimum “dead" 20
portion. In my preferred i1lustration,_I show
a clip 236 insertable in a corresponding slot 231
of the drum 225. The clip 23!; extends across
the length of the slot and contains two opposed
sides 231, 238 which are crimped and spring
biased outwardly. The ends 3| and 32 of the
sheet 28 correspond to the darkened regions illus~
trated in Figure 7, and are inserted into the slot
231 of the drum 225. The sheet is smoothed
around the drum surface and the clip 235 is 30
inserted into the slot to hold the sheet ?rmly
in position by spring action against the edges
The strip feeding mechanism, mounted upon
of the slot. The width of clip 236 is made as
upright 2“, is fed at a constant rate transverse narrow as feasible. The outer surface of clip 235
35 to the scanning mechanism (not shown). A is blackened so as‘not to create a sound impulse
pinion H2 is mounted on the drive shaft 208 for when passing across the scanning beam.
motivating the feed screw 2l3. Feed screw M3
Although I have described the sound sheet 28
is connected to a gear 2“ connected with pinion containing the parallel lines 30 as being a por
2l2. An extension of bed plate 2| 5 coacts with tion of a newspaper, it is to be understood that
40 ‘the threaded portion of feed screw 2l3. Bed these sheets may be sold inmagazine- form,‘re
40
2I5 rides in a dove-tailed bracket support 215. movable by youngsters or blind individuals for
The transverse movement of bed plate 2l5 car-_ reproduction upon the drum apparatus corre
ries with it the upright'2ll of the strip feeding sponding to the modi?cation herein described in
mechanism. _The _rate of feed of the strip 203 connection with Figures 31 to 33. The speed of
45 across the scanning beam is predetermined in rotation of the apparatus is readily determined
45
accordance with the pitch of the helical arrange
by the operator after a'few trials since the main
ment ofvthe sound tracks 200. Figure 30 is an tenance of the quality of the sound reproduc
end view of the upright 2H coacting with the tion is the best indication of the correct speed.
bracket 2H5.
'
When a synchronous motor is used, the speed,
50
A furthermodi?cation for a simple inexpen
however, automatically is maintained.
sive sound recording mechanism useful for
printed sound records is illustrated in Figures
31 to 33. This modi?cation is used in conjunc
tion withthe sound sheet 28 hereinabove de
Although I have illustrated preferred forms
which the sound records and reproducing appa
ratus therefor may take, it is to be understood
that. further modi?cations and changes may be
55 scribed in connection with Figures '7 and 3. The
sound sheet 28 is mounted upon a cylindrical _made by those' skilled in the art without de
drum 225 so thatthe opposite ends of the tracks
30 are placed in proper positionfto form a con
tinuous spiral or- helix of the sound record. This
60 simpli?ed mechanism may be driven by a hand
lever 225. The massof the drum 225 serves. the
purpose of a fly-wheel for steadying the rotative
efforts of the operator. It is to be understood
that an electric motor drive may be employed
65,
for this modi?cation.
‘
'
_
The sheet 20 is a predetermined size to
smoothly ?t ~upon the surface of drum 225. The
parting from the broader spirit and scope of
my present invention, and accordingly I do not
intend to be limited except as set forth in the
following claims.
.
__
.
I claim:
1. The combination with mechanism _for feed-v
ing a strip containing a plurality of parallel sound
tracks, of means for scanning said‘sound tracks
for producing electrical currents corresponding
to the sound to be reproduced comprising a source 65
of light focused to a narrow beam directed upon
a single sound track, photo-electric means for >
electro-optical scanning means 221 is mounted ‘ translating light from the strip into electrical
on a dove-tailed slide 228 and driven at a pre
currents, and means for acoustically transform
determined'rate parallel to the axis of the drum
225 by feed-screw .230. The electrical connections
ing said currents; and means responsive to a 70
notch on said strip for moving the next adjacent
to the electro-optical scanners 221 are made by parallel sound track to a position opposite said
a flexible cable 23L Reduction gearing 232 con
scanning beam, including a device for, shifting
nects the.drum 225 with the feed screw 230 _ said'strip feeding mechanism transverse to said
75 to maintain a predetermined rate of ' scanning
1
scanning means step by step, the distance of each 75
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